| //// |
| Licensed to the Apache Software Foundation (ASF) under one |
| or more contributor license agreements. See the NOTICE file |
| distributed with this work for additional information |
| regarding copyright ownership. The ASF licenses this file |
| to you under the Apache License, Version 2.0 (the |
| "License"); you may not use this file except in compliance |
| with the License. You may obtain a copy of the License at |
| http://www.apache.org/licenses/LICENSE-2.0 |
| Unless required by applicable law or agreed to in writing, |
| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
| specific language governing permissions and limitations |
| under the License. |
| //// |
| :documentationPath: /pipeline/transforms/ |
| :language: en_US |
| :description: The Detect Empty Stream transform outputs one single empty row of data if the input stream is empty (ie when input stream does not contain any row). The output row will have the same field layout as the input row, but all field values will be empty (null). |
| |
| = image:transforms/icons/detectemptystream.svg[Detect Empty Stream transform Icon, role="image-doc-icon"] Detect Empty Stream |
| |
| [%noheader,cols="3a,1a", role="table-no-borders" ] |
| |=== |
| | |
| == Description |
| |
| The Detect Empty Stream transform outputs one single empty row of data if the input stream is empty (ie when input stream does not contain any row). |
| The output row will have the same field layout as the input row, but all field values will be empty (null). |
| |
| If the input stream is not empty it will not output anything. |
| |
| | |
| == Supported Engines |
| [%noheader,cols="2,1a",frame=none, role="table-supported-engines"] |
| !=== |
| !Hop Engine! image:check_mark.svg[Supported, 24] |
| !Spark! image:question_mark.svg[Maybe Supported, 24] |
| !Flink! image:question_mark.svg[Maybe Supported, 24] |
| !Dataflow! image:question_mark.svg[Maybe Supported, 24] |
| !=== |
| |=== |
| |
| == Options |
| |
| [options="header"] |
| |=== |
| |Option|Description |
| |Transform name|Name of the transform. |
| This name must be unique throughout the pipeline. |
| |=== |
| |